2道计算题 求救(-0.8)+1.2+(-0.7)+(-2.1)+0.5+3.52分之1+(-3分之2)+5分之4+(-2分之1)+(-3分之1)
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![2道计算题 求救(-0.8)+1.2+(-0.7)+(-2.1)+0.5+3.52分之1+(-3分之2)+5分之4+(-2分之1)+(-3分之1)](/uploads/image/z/1246341-21-1.jpg?t=2%E9%81%93%E8%AE%A1%E7%AE%97%E9%A2%98+%E6%B1%82%E6%95%91%EF%BC%88-0.8%EF%BC%89%2B1.2%2B%EF%BC%88-0.7%EF%BC%89%2B%EF%BC%88-2.1%EF%BC%89%2B0.5%2B3.52%E5%88%86%E4%B9%8B1%2B%EF%BC%88-3%E5%88%86%E4%B9%8B2%EF%BC%89%2B5%E5%88%86%E4%B9%8B4%2B%EF%BC%88-2%E5%88%86%E4%B9%8B1%EF%BC%89%2B%EF%BC%88-3%E5%88%86%E4%B9%8B1%EF%BC%89)
2道计算题 求救(-0.8)+1.2+(-0.7)+(-2.1)+0.5+3.52分之1+(-3分之2)+5分之4+(-2分之1)+(-3分之1)
2道计算题 求救
(-0.8)+1.2+(-0.7)+(-2.1)+0.5+3.5
2分之1+(-3分之2)+5分之4+(-2分之1)+(-3分之1)
2道计算题 求救(-0.8)+1.2+(-0.7)+(-2.1)+0.5+3.52分之1+(-3分之2)+5分之4+(-2分之1)+(-3分之1)
(-0.8)+1.2+(-0.7)+(-2.1)+0.5+3.5
=-0.8+1.2-0.7-2.1+0.5+3.5
=(-0.8+1.2)-(0.7+2.1)+(0.5+3.5)
=0.4-2.8+4
=-2.4+4
=1.6
2分之1+(-3分之2)+5分之4+(-2分之1)+(-3分之1)
=1/2-2/3+4/5-1/2-1/3
=(1/2-1/2)-(2/3+1/3)+4/5
=0-1+4/5
=-1+4/5
=-1/5
(-0.8)+1.2+(-0.7)+(-2.1)+0.5+3.5
=-0.8+1.2-0.7-2.1+0.5+3.5
=0.4-2.8+4
=1.6
2分之1+(-3分之2)+5分之4+(-2分之1)+(-3分之1)
=1/2-2/3+4/5-1/2-1/3
=4/5-1
=-1/5
(-0.8)+1.2+(-0.7)+(-2.1)+0.5+3.5
=-(0.8+0.7+2.1)+1.2+(0.5+3.5)
=-3.6+1.2+4
=1.6
2分之1+(-3分之2)+5分之4+(-2分之1)+(-3分之1)
=(1/2-1/2)+(-2/3-1/3)+4/5
=-1+4/5
=-1/5
(-0.8)+1.2+(-0.7)+(-2.1)+0.5+3.5=1.6
2分之1+(-3分之2)+5分之4+(-2分之1)+(-3分之1)=-5分之1